Mcol 5776 support functions not in group by

[mariadb-SergeyZefirov]

An attempt to make our support of SELECT GROUP BY to be closer to server's.

[mariadb-SergeyZefirov]

What does this patch do:

• it prevents wrapping into aggregates values under GROUP BY keys, changes in ha_mcs_execplan.cpp are related to that;
• it also disabled lowering of HAVING filter into WHERE if there are no aggregates (joblistfactory.cpp).

Other changes are related to build troubles (CMakefile.txt) and not much else.

There will be a separate PR for regression suite.

Right now it is still draft and is not rebased for me to have history of changes.